SNA acceleration method considered as a "new" and better acceleration method compared with default. Lot of benchmarks shows us that SNA is faster.
This acceleration method supported by the 2.20 Intel driver.

How can I enable and test this method under Ubuntu 12.04 - 12.10 ?
And how can I revert back if something goes wrong ?

1 Answer
1

Due to LTS version of 12.04 , the new point releases will have the HWE stack of the current stable release (right now 12.04.3 has HWE stack of 13.04).
The next point releases of 12.04 (12.04.2 and 12.04.3) have the HWE stack of 12.10 and 13.04 respectively. So the Intel driver is above 2.20 and the following procedure of upgrading the Intel driver is not needed.

Check the current Intel driver version. Apply
this command

apt-cache policy xserver-xorg-video-intel* | grep Installed

If the results of Installed are under 2.20 e.g. 2:2.17.0-1ubuntu4 0 , then proceed with the procedure below to upgrade the driver.

Open a terminal (Ctrl + Alt+T) and apply the commands below to upgrade the Intel driver to the latest version

Well , is the same method as above , but you have to avoid the upgrade of the driver , because Ubuntu 12.10 has the 2.20 Intel driver by default. Also in newer versions of Ubuntu the SNA acceleration method is enabled by default.

Check if the SNA acceleration method is enabled and in use with the following command